docs fix: decode_complete scope and algorithms (#982)

* docs fix: Correct scope for decode_complete()

* docs fix: Algorithms in decode_complete()

Author: RbnRncn

docs/usage.rst

@@ -352,10 +352,11 @@ is not built into pyjwt.
     signing_key = jwks_client.get_signing_key_from_jwt(id_token)
 
     # now, decode_complete to get payload + header
-    data = jwt.decode_complete(
+    data = jwt.api_jwt.decode_complete(
         id_token,
         key=signing_key,
         audience=client_id,
+        algorithms=signing_algos,
     )
     payload, header = data["payload"], data["header"]